Roller mandrel



(No Model.)

S.P.M.TASKER. ROLLER MANDREL.

No. 382,016. PatentedMay 1, 1888.

FIG I. FIE 2V2 FIG 3 s Shets-Sheet 1.

INVENTOR 2.

(No Model.)' 8 Sheets-Sheet 2.

s. P M. TASK-ER.

ROLLER MANDREL. No. 382,016. Patented May 1, 1888.

' WITNESSES:

N. PETERS, Phow-Limu m mr, Waahi nnnnnnn c.

s Shets-Sheet 3.

(No Model.)

S P. M. TASKER.

. ROLLER MANDRBL.

Patented May 1, 1888.

WlTNE-SSES:

(No Model.) 8 Sheets-Sheet 4.

' S. P. M. TASKER.

ROLLER MANDREL.

No. 382,016. PatentedMay 1, 1888.

WITNESSES:

8 Sheets-Sheet 6.

(NoModL) I S. P. M. TASKER.

ROLLER MANDREL.

Pateilted May 1-1888.

WITNESEEE (No Model.) 8 Sheets-Shet 8.

M. TASKER.

ROLLER MANDREL. No. 382,016. Patented May 1. 188.

IIWIIIIMIHHNHILI:

FIG 23 m I, E: i t||l|||||||||||||||||l1fllllHll Ef mmvag UNITED STATESPATENT OFFICE.

STEPHEN P. M. TASKER, OF PHILADELPHIA, PENNSYLVANIA.

ROLLER MANDREL.

SPECIFICATION forming part of Letters Patent No. 382,016, dated May 1,1888.

I Application filed November 9, 1887. Serial No. 254,667. (No model.)

My invention relates to a class of mandrels V in which the head, ball,or mandrel proper, is provided with two, three, four, five, or moreellipsoidal friction rolls mounted in bearings in a stock or case, andadapted to be introduced within the tube to be rolled. Types of mandrelsof the foregoing class, which are of my invention, are to be found inUnited States Letters Patent N 0. 151,323, dated May 26, 1874; and Nos.331,570, 331,573, and 331,578, all dated December 1, l885,--to whichLetters Patent reference is to be made for the better understanding ofmy present improvements.

The intention of the employment of mandrels of the foregoing class, itmay be premised, is to obviate friction between the interior surfaces ofthe tube and the ball of the ordinary mandrel, and to permit of the moreready passage of the tube over the mandrel and withdrawal of the mandrelfrom said tube.

My present invention is applicable to roller mandrels of the characterset forthin the foregoing patents.

The object of my present invention is to provide means for positivelydriving the mandrel rolls, so as to render them no longer idler rollsthe movement of which is wholly due to the movement of the tube uponthem, but

positively driven rolls which move under the thrust or impulse ofsuitable actuating devices with a positive rotative motion which is thesame as, or greater, or less, than, that of the tube operated upon.

To such end my invention, broadly stated, comprehends the provision inconnection with the rolls of a roller mandrel of driving gearing of anypreferred character,and substantially, for instance, of any suchcharacter as is represented in the accompanying drawings and hereinafterreferred to,which is disposed be tween the mandrel rolls with which itis engaged, and a prime mover of any preferred character with which itis also engaged, and

which receives its movement from said prime mover and transmits it tosaid rolls,-the arrangement as an entirety being substantially such thatthe connective gearing, be its specific mechanical character what itmay, operatively unites the prime'mover and the mandrel rolls andimparts to said rolls a positive movement transmitted direct and derivedfrom said prime mover.

Such being the general character of my invention, it is apparent thatthe form of the gearing intermediate between the prime mover and thedriven rolls may structurally vary and assume the form of many wellknown mechanical movements, and that the prime mover. may likewise varyand be a motor of any suitable character.

Such constructions as are represented in the accompanying drawings andherein described alike embody my invention, the particular subjectmatter of which claimed as novel is hereinafter definitely specified.

Figure 1 is a top plan view of a mandrel having two rolls, the axes ofwhich lie in the same plane. Fig. 2 is a transverse, vertical, sectionalelevation through the mandrel of Fig. 1 in the plane of the dotted linewm of said figure. Fig. 2% is an end elevation of aprime mover which Ifind it convenient to employ to actuate the driving gearing of themandrel rolls shown in the mandrel of Figs. 1 and 2. Fig. 3 is a topplan View ofa mandrel having two rolls the axes of which, although inparallel horizontal planes, are inclined to one another. Fig. 4 is afront elevational view,partly sectional, of the rolls represented inFig. 3. Figs. 5 and 6 are transverse, vertical, sectional elevationsthrough mandrels having three rolls, which are adapted to be actuated bydriving gearing constituted by racks of different form. Fig. 7 is a sideelevational view of the mandrel represented in Fig. 6, in connectionwith driving gearing constituted by a convenient rack device foractuating its rolls, and with a convenient prime mover for actuatingsaid rack. Fig. 8 is a right hand end elevational view of the primemover represented in Fig.7. Fig. 9 isacentral, vertical, longitudinal,sectional side elevation through such a mandrel as is represented inFig. 2, provided with driving gearing constituted by a sprocket orchain-wheel device for actuating its rolls. Fig. is a left hand endelevational view of the mandrel head of Fig. 9. Fig. 11 is a right handend elevational view of the mandrel standard and a convenient primemover for actuating the sprocket chain gearing shown in Fig. 9, thechains being, for clearness, omitted. Fig. 12 is a view in perspectiveof the mandrel head shown in Figs. 9 and 10, said head being verticallysectioned in the plane of the axes of the rolls. Fig. 13 isaface view ofa mandrel com posed of three elliptical rolls adapted to be driven bysprocket chains. Fig. 14 is a similar view of two eylindric rollsadapted to be similarly driven. Fig. 14% is a similar view ofsuch amandrel as is shown in Fig. 13, the elliptic rolls being turned topresent flat or more strictly conical peripheral surfaces whichcorrespond and receive the thrust of the rolls against each other. Fig.15 is a similar view of three cone-ended cylindric rolls embodying myinvention and adapted to be driven by sprocket chains. Fig. 16 is acentral, vertical, longitudinal, sectional side elevation through such amandrel as is represented in Figs. 1 and 2, when the mandrel rolls arecircumscribed each by a series of sunken worm teeth and are driven bygearing constituted by a longitudinally-extending worm shaft preferablyhoused within the mandrel rod. Fig. 17 is a transverse, vertical,sectional elevation through the mandrel head of Fig. 16 in the plane ofthe dotted line y y upon said figure. Fig. 18 is a central, vertical,longitudinal, sectional side elevation through such a mandrel as isrepresented in Figs. 1 and 2, when the mandrel rolls are circumscribedeach by a series of sunken angle teeth, and driven by gearingconstituted by a pair of angle tooth wheels mounted withinthe mandrelhead upon shafts parallel respectively with the respective axes of themandrel rolls, and engaged with the teeth of the mandrel rolls, the saidangle tooth wheels being actuated by an angle tooth pinion mounted upona shaft eX- tending longitudinally and conveniently within the mandrelrod. Fig. 19 is a transverse, vertical, sectional elevation through themandrel head of Fig. 18, in planes of the dotted line 2 2 upon saidfigure,and sight being taken in the direction of the arrows upon saidline. Fig. 20 is a fragmentary sectional plan of the mandrel head ofFig. 18, in planes of the dotted line to 10 upon said figure. Fig. 21 isa longitudinal, sectional plan in planes of the dotted line '0 o of Fig.22, through such amandrel as is represented in Figs. 1 and 2, when themandrel rolls are actuated by driving gearing constituted by a pair ofcounter pin ions which are not only engaged with each other but also,respectively, with the sunken teeth of the mandrel rolls, and which aremounted upon pinion shafts upon one ofwhich latter is secured a beveledpinion engaged with a second beveled pinion right angular to it andmounted upon a longitudinal bevel gear shaft conveniently housed withinthe lower portion of the mandrel rod. Fig. 22 isa vertical,longitudinal, sectional side elevation through the mandrel representedin Fig. 21 in planes of the dotted line a u of said figure. Figs. 23 and2a are, respectively, a central, longitudinal, sectional plan, and acentral, vertical, longitudinal side elevation, through such a mandrelas is represented in Figs. 21 and 22, with the exception that thecounter pinions of the driving gearing are not engaged with each otherbut are both engaged with'a spiral tooth wheel mounted in a plane rightangular to said pinions upon a longitudinally extending wheel shaftconveniently housed centrally within the mandrel rod. Fig. is a faceview of the spiral tooth wheel shown in Figs. 23 and 24;.

Referring now to Figs. 1 and 2, which represent a mandrel embodying myinvention and having two rolls the axes of which lie in parallelhorizontal planes and in a common verti cal plane,-A A are twoellipsoidal metal rolls mounted in a stock or mandrel head B, which maybe of any desired construction, and which is the advance terminalportion of a hollow mandrel rod 13*. b are journals or axles upon whichthe rolls are mounted for r0- tation. These axles may either be formedupon or applied to the rolls, or be formed upon or applied to themandrel head. The rolls are spaced apart a sufficient distance to admitbetween them driving gearing oonstituted by a I; double-faced or doublerack C, and are each.

provided with a series of sunken teeth a which circumscribe therespective rolls in a central transverse or diametric plane, and withinwhich are respectively engaged the two series of teeth of the rack. Itis obvious that the longitudinal reciprocation of the rack will, throughthe engagement of its teeth with the circular series of sunken teeth inthe rolls,occasion the reverse or opposite rotation of the respectiverolls in a direction correspondent with the direction of movement of therack, whereof hereinafter. Anysuitable means for imparting reciprocationto the rack may be employed. I find a convenient prime mover for thepurpose, to be some such contrivance as is represented in Fig. 2'}, inwhich the rack O is engaged between two toothed rack wheels PP", theaxlesp 19' of which are supported in a housing Q, and respectivelyprovided with sister gear wheels R R which are engaged with each other.The axle 11 ofthe lower rack wheel is also provided with a pulley Q" bymeans of which rotation is imparted to it and consequently to its rackand gear wheels. The entire device constitutes a positively operatingprime mover which according to the direction of movement of the pulleyoccasions the thrust or the retraction of the rack.

In Figs. 3 and 4 I have represented a mandrel provided with a pair ofellipsoidal rolls A A which cross each other at angles, thatis to sayhave their respective longitudinal axes IIO so disposed as to cross orbe inclined to each other, which are similarly provided with centrallycircumscribingsunken teeth a,and which are actuated by driving gearingconstituted by a double spiral rack 0*, the pitch of which correspondswith the respective inclinations of the respective series of teeth ofthe rolls, and the longitudinal movement of which occasions a reverserotation of said rolls in either direction according to its direction.Any prime mover adapted to actuate the rack may be employed.

In Figs. 5, 6, and 7, I have represented a roller mandrel having threerolls A A A the axes of which lie in a common plane, and when projectedform an equilateral triangle. In Fig. 5 I have represented pinions a,formed upon the ends of all the rolls, which are engaged by drivinggearing constituted by three double faced longitudinally extending racksc erected from a three-armed spider O suitably actuated for longitudinalmovement by any preferred prime mover. In Figs. 6 and 7 the three rollsare each provided with a central series of sunken teeth a a a which areengaged with driving gearing constituted by'a triangular rack 0 thethrust of which, acting against the teeth of the rolls, occasions theirrotation.

In the forms of mandrel last above described and illustrated in Figs/5,6, and 7, the mandrelhead has three parts or sections and is lettered 13Y I In Figs. 7 and 8 I have represented a convenient prime moverforactuating the rack.

It is however, to be understood, that I do not restrict myself to thespecific devices represented, hut contemplate the employment as a primemover generically considered of any suitable mechanism, such, forinstance, as an hydraulic, air, orsteam, rack-actuating, plunger, acrank and pitman, or kindred device.

Referring now to Figs. 7 and 8, D isa mandrel standard for supportingthe mandrel rod and mandrel head, the same being hollow to admit thepassage of the rack 0 through it and through said mandrel rod and headto the mandrel rolls. E isahousing of any preferred construction,supporting three similarly angularly disposed pinions e, whichtogetherengage with the triangular rack 0 in the man ner represented in thedrawings. Two of these pinions,in the drawings the lower oncs,areidlers, while the upper pinion is fixedly mounted upon a shaft e whichprojects beyond its bearings and is journaled in boxin gs supported uponpulley stand ards F,between which latter said shaft is provided with apulley G the motion ofwhich when driven imparts motion to the top pinione, and thence to the rack to cause its reciprocation in eitherdirection. If desired all of the pinions may be positively driven.Referring now to Figs. 9, 10, 11, and 12, which represent an embodimentof my invention utilizing sprocket chains as a connecoutside of saidmandrel rod.

tive gearingfor transmitting from a prime mover a positive motion to themandrel rolls the following is the construction of a prime mover which Iprefer to employ: a mandrel standardD is equipped with two sprocketwheels H, mounted upon axles h which are parallel and both of whichextend beyond the standard at one side and are equipped with gear wheelsh which mesh together. One of the axles is prolonged beyond its gearwheel and equipped with driving pulleys H The mandrel rolls A A are eachprovided with a series of sunken sprocket lugs s, which preferablycircumscribe the respective rolls in a central transverse or diametricplane, and which are adapted to be engaged with driving gearingconstituted by two endless sprocket chains S which also pass over andare driven by the sprocket-wheelsH in the mandrel standard. Suchportions of the chains as for the time being run side by side, or cometogether in their passage respectively over the sprocket wheels androlls, conveniently pass through the hollow mandrel rod D ,while theirouter or distant portions pass respectively above and below and to theIt is obvious that rotation imparted to the driving pulleys, occasioninga reverse rotation of the sprocket wheels, will occasion, through theopposite travel of the respective sprocket chains, the opposite rotationof the rolls. The construction of the mandrel rod, mandrel head, andstandard, are substantially identical with that heretofore described.The mandrel head is,

however, shown as provided with a circular flange If by which anadditional head carrying additional rolls can, if desired, be secured tothe mandrel head represented.

The rolls represented in Fig. 14 can be driven by chains set and gearedsubstantially in the same manner as those above described.

The rolls of the mandrels represented in Figs. 13 and 15 are adapted tobe driven by gearing constituted by three independent sprocketchains,which may be primarily actuated by three sprocket wheels mountedin the mandrel standard much after the manner of the pinions applied tothe housing of Fig. 8, the shafts..o f such sprocket wheels beingextended and provided with suitable bevel gears after a manner obviousto any mechanic. The sprocket lugs or teeth may be applied to the endsor other portions of the rolls than the central portions; and, ifdesired,'but one of the rolls may be positively driven. The sprocketgearing is of especial application to mandrels of the construction setforth in my Patents Nos. 151,323, and 331,570. The rolls of Fig. 15 areadapted for use in rolling sixsentedin Figs. 14! are each turned topresent flat, or, more strictly, conical peripheral surfaces Z whichcorrespond and therefore mutually receive the internal thrust of therolls which bear against each other in the region of such flattenedsurfaces. This construction is important as tending to preserve therolls from wear and as steadying them.

Referring now to Figs. 16 and 17, which represent an embodiment of myinvention utilizing a worm shaft as a driving gearing for imparting apositive motion to the mandrel rol1s,the mandrel standard D is equippedwith a bearing 01 through which passes one extremity of a worm shaft K,the other extremity of which passes through a bearing 11 formed in adiaphragm I) erected within the mandrel head B. In this construction themandrel rolls A A are each circumscribed by a series of sunken wormteeth a which engage with aworm is on the worm shaft K. The worm shaftextends through the bearing b to the rear of the mandrel standard, andas to its projecting extremity is equipped with a prime moverconstituted by a pulley I, by

means of which rotation is imparted to it. It

is obvious that the rotation imparted to the shaft will, through theaction of the worm upon the sunken worm teeth of the rolls, occasion theopposite rotation of said rolls.

The construction of the mandrel rod, mandrel head, and standard, isessentially such as that of the same members of the mandrels, alreadydescribed, except that, for convenience, the mandrel head is madedetachable fromthe mandrel rod.

Referring now to Figs. 18, 19, and 20, which represent an embodiment ofmy invention utiliziug the motive power of driving gearing constitutedby a shaft equipped with an angle tooth pinion, such as is representedin Fig. 16, for driving the rolls,J J are a pair of angle tooth wheelsmounted,respectivelyabove and below the angle tooth pinion k on theshaft K, upon shaftsjj parallel respectively with the axes of themandrel rolls and respectively convenientlyjournaled in shaft hubsj castwithin or otherwise connected with the mandrel head.

These worm angle tooth wheels respectively in a cross web I) securedwithin the mandrel head. Rotation imparted to the pinion shaft by anysuch prime mover as the pulley shown will occasion the reverse rotationof the mandrel rolls through the intermediate rotation imparted by saidshaft to the angle tooth wheels which are, as stated, engaged with boththe pinion on the shaftand with the mandrel rolls.

Referring now to Figs. 21 and 22, which represent an embodiment of myinvention utilizing driving gearing constituted by a pair of mutuallyengaged counter pinions respectively also engaged with the respectivemandrel rolls and actuated by a bevel gearing applied to the shaft ofone of them, the said counter piuions,L L are a pair of counter pinionsmounted upon pinion shafts Z Z supported within the mandrel head inparallelism re spectively with each other and with the axes of themandrel rolls. M is a beveled pinion mounted upon the shaft of the lowercounter pinion and engaged with a bevel pinion M mounted in a planeright angular to the plane in which said pinion rotates upon the forwardextremity of a bevel gear shaft ,N the forward extremity of which latteris supported in a bearing a within the mandrel head while its rearextremity is supported within a bearing a formed in the mandrelstandard. Rotation is conveniently imparted to this bevel gear shaft bya prime mover being a pulley I applied to the rear of the mandrelstandard. It is obvious that in this construction rotation imparted tothe bevel gear shaft will, through the bevel gear, occasion the rotationof the lower pinion shaft and consequently of the lower pinion, fromwhich latter rotation will be imparted to the upper pinion, while bothof said pinions will by their common but reverse rotation oecasion thereverse rotation of the mandrel rolls.

Referring now to Figs. 23, 24, and 25, which represent an embodiinentofmy invention utilizing driving gearing constituted by a pair of counterpinions, not, however, mutually engaged, but separately engaged with themandrel rolls and with aspiral tooth wheel common to both, 0 representsthe said spiral tooth wheel which is mounted upon a wheel shaft Oconveniently housed, as shown, within the mandrel rod. The teeth uponthis wheel are in the form of curved or spiral ribso as shown in Fig.25, and the wheel itself is mounted in a vertical plane in such positionthat its said teeth engage the teeth of both counter pinions at the sametime, while the teeth of said pinions also engage the sunken teeth uponthe mandrel rolls. The pulley I is the prime mover. Rotation imparted tothe shaft in this instance, therefore, occasions the reverse rotation ofthe counter pinions and the consequent rotation of the mandrel rolls. Itis obvious that this construction differs only from that represented inFigs. 21 and 22 in the means employed for actuating the counterpinions,-the spiral toothed wheel being a substitute for the bevelgeardeviee ofsaid figures.

It is apparent that in all of the foregoing construct-ions latitude maybe accorded the constructor as to the details of construction andarrangement of the mandrel, mandrel head, and standard, as well as inthe matter of formation, mounting and arrangement of the racks, chains,shafts, counter shafts, bearings, pinions, &c., which in.the severalorganiza tions form parts of the driving gearing as such, -it beingborne in mind that the inveu tion so far as it is concerned with drivinggear- Such being a description of forms of roller mandrel alikeembodying my invention, it is proper for me to state that the shape andconfiguration of the rolls, as well as the outersurfaces of the mandrelhead, may be made to correspond to the interior configuration of tubesof various forms other than those illustrated. The mandrel in connectionwith external rolls or dies constitutes a rolling mill, adapted for usein the manufacture of all kinds of malleable metal tubes, which formsthe subject of an application for patent I am about to file.

In practice the bellied, or other. intermediate, portions of thesections of the stock lie below the circle, or figure, circumscribinglongitudinally the rolls; and this is important, because said sectionsare not intended to bear against the bore of the tube.

In the use of. the mandrel it will be understood that after the tube hasbeen rolled, it should be rotated to bring that portion of its interiorsurface which in the previous pass has come over the sections of thestock over the centers or rolling surfaces of the rolls, and that thisoperation should be repeated as often as desirable, or until the tube asto every part of its interior surface has been acted upon by the rolls.

In constructions in which racks are the driving gearing, the shape andcharacter and location of the teeth both of the rack and of the rollsare not material, the office of the teeth as such being simply to insurethe engagement between the rack as a body capable of longitudinal thrustunder the influence of a prime mover, and the rolls as bodies capable ofrotation and adapted to be positively rofated by said thrust. It isobvious, therefore, that instead of teeth strictly as such depres' sionsand -corresponding elevations of any suitable character, or a plain baractuating the rolls by friction, may be employed. It is also obvious, asdescribed in certain of the patents referred to, that the mandrel headmay be, and preferably is, constructed in parts or sections, adapted tobe suitably united together.

Having thus described my invention, I claim 1. A mandrel head containingtwo or more positivelydriven rolls, substantially as and for thepurposes set forth.

2. In combination, a mandrel head containing two or more rolls, anddriving mechanism, essentially such as set forth, for positively drivingsaid rolls, substantially as and for the purposes set forth.

3. In a roller mandrel substantially such as set forth, the combinationof two or more mandrel rolls, gearing for positively driving said rolls,and a prime mover for actuating said gearing.

4. In a mandrel for rolling tubes, the combination of a mandrel rod,rolls mounted rotatively therein, a prime mover mounted in connectionwith said mandrel rod, and gearing operatively uniting said prime moverand rolls, substantially as set forth.

5. In a mandrel for rolling tubes, the combination of mandrel rollsmounted rotatively therein, teeth identified with said rolls, propulsivegearing engaging with said teeth, and means for applying power to saidpropulsive gearing.

6. The combination, to form a mandrel for rolling tubes, of two or morerolls provided with teeth, a mandrel head for carrying said rolls, and arack which is engaged with the teeth of said rolls, substantially as andfor the purposes set forth.

7 The combination, to form a mandrel for rolling tubes, of two or morerolls provided with teeth, a mandrel head for carrying said rolls, arack which is engaged with the teeth of said rolls, and meansforimparting longitudinal thrust to said rack, substantially as and for thepurposes set forth.

8. The combination, to form a mandrelfor rolling tubes, of two or morerolls provided with teeth, a mandrel head for carrying said rolls, and arack which passes between or among the rolls and is engaged with theteeth of said rolls, substantially as and for the purposes set forth.

9. The combination, to form a mandrel for rolling tubes, of two or morerolls provided with teeth, a mandrel head for carrying said rolls, arack which passes between or among the rolls and is engaged with theteeth of said rolls, and means for imparting longitudinal thrust to saidrack, substantially as and for the purposes set forth.

10. The combination, in a roller mandrel, of two ellipsoidal rolls theaxes of which are inclined to each other and which are provided withteeth, a mandrel head carrying said rolls, and a rack which is engagedwith the teeth of said rolls, substantially as and for the purposes setforth.

11. The combination, in a roller mandrel, of two ellipsoidal rolls theaxes of which are inclined to each other, and which are provided withteeth, a mandrel head carrying said rolls, a rack which is engaged withthe teeth of said rolls, and means for imparting longitudinal thrust tosaid rack, substantially as and for the purposes set forth.

12. The combination, in a roller mandrel, of two ellipsoidal rolls theaxes of which are inclined to each other and which are provided withsunken teeth circumscribing their central portions, a mandrel headcarrying said rolls, and a spiral rack which passes between said rollsand is engaged with the sunken teeth thereof, substantially as and forthe purposes set forth.

13. The combination, in a roller mandrel, of two ellipsoidal rolls theaxes of which are inclined to each other, and which are provided Intestimony whereoflhavehereunto set my with sunken teeth eircnmscribingtheir cenhand this 8th day of November, A. D. 1887. tral portions, amandrel head carrying said rolls, a spiral rack which passes betweensaid i STEPHEN P. M. TASKER. rolls and is engaged with the sunken teeththereof, and means for imparting longitudinal In presence of thrust tosaid rack, substantially as and for J. BONSALL TAYLOR, the purposes setforth. F. NORMAN DIXON.

